Many hardware platforms do have the protection that you describe, but it depends on the software to set up the protection.
Also someone would need to have intimate knowlege of your platform to be able to write such an attack. The non-x86 platforms are probably less likely to be attacked in this manor from a virus. It may cause an application crash.
And if you have someone internal that has the skill to do this, they probably are already privileged enough that they would have no problem compromising a system and covering their tracks.
-John [EMAIL PROTECTED] Personal Opinion Only
